CN115806830B - Method for replacing checker bricks of regenerative chamber of 7.63m coke oven in row mode - Google Patents
Method for replacing checker bricks of regenerative chamber of 7.63m coke oven in row modeInfo
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- CN115806830B CN115806830B CN202211694257.2A CN202211694257A CN115806830B CN 115806830 B CN115806830 B CN 115806830B CN 202211694257 A CN202211694257 A CN 202211694257A CN 115806830 B CN115806830 B CN 115806830B
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- checker bricks
- regenerator
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- checker
- coke oven
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Abstract
本发明涉及焦炉热态维修技术领域，公开了一种7.63m焦炉蓄热室格子砖通排式更换方法，包括如下步骤：A)提前对需更换格子砖的蓄热室进行加热制度调整，保证在格子砖更换过程中蓄热室有充足的热源进行温度保持；B)对旧格子砖进行拆除；C)新格子砖回装。本发明7.63m焦炉蓄热室格子砖通排式更换方法，配合炉墙保温完善和恢复后的炉墙修复方式的改进，成功完成了7.63m焦炉全炉的蓄热室格子砖更换。
This invention relates to the field of coke oven hot maintenance technology, and discloses a method for replacing checker bricks in the regenerator chamber of a 7.63m coke oven using a through-hole method. The method includes the following steps: A) Adjusting the heating regime of the regenerator chamber where the checker bricks need to be replaced in advance to ensure sufficient heat source for temperature maintenance during the replacement process; B) Removing the old checker bricks; C) Reinstalling the new checker bricks. This invention, combined with improvements to the furnace wall insulation and restoration methods, has successfully completed the replacement of checker bricks in the regenerator chambers of a 7.63m coke oven.
Description
Technical Field
The invention relates to the technical field of coke oven thermal state maintenance, in particular to a through-row type replacement method for checker bricks of a regenerative chamber of a 7.63m coke oven.
Background
The coke oven checker brick is a perforated refractory brick used for heat exchange in a coke oven heat accumulation chamber, and is used for recovering waste heat of exhaust gas discharged by a coke oven combustion chamber through alternately absorbing and releasing heat and heating the coke oven fuel before combustion, so that the combustion efficiency of the coke oven can be improved, and the energy consumption can be reduced.
In the production process, as the service time of the coke oven is changed, the checker bricks in the heat storage chamber of the coke oven deform and melt due to the erosion of impurities in the high temperature and gas, so that the resistance of the air flow in the heat storage chamber is increased, and the normal heating of the coke oven is affected. When the conventional cleaning and dredging method is ineffective, the checker bricks in the heat storage chamber need to be replaced.
However, the temperature of the top part of the regenerator is more than 1000 ℃ and the regenerator wall is made of silica bricks, and irreversible damage can occur when the temperature of the regenerator wall is reduced to below 573 ℃ of the crystal form conversion point, so that part of the checker bricks can be replaced only under the condition of not entering the regenerator.
The key point of the method is to enter the regenerator to perform row replacement on the checker bricks, and the method is to solve the contradiction between the control temperature of the regenerator wall and the space temperature which can be accessed by operators. On the one hand, the furnace wall temperature of the regenerator cannot be lower than the crystal transformation point 573 ℃ of the silica bricks, and on the other hand, the highest space temperature which can be born by a human body cannot exceed 120 ℃. The temperature of the working space can be realized by perfect and good heat insulation materials, but the heat insulation difficulty of the furnace wall is higher. The width of the regenerator is 550mm, only one person can enter and exit at a time, 6912 checker bricks of each regenerator are taken up, more than 40 tons are heavy, the whole operation time is about 70 hours, and the heat dissipation in the regenerator is serious. Meanwhile, the combustion chamber of the corresponding regenerator is in a non-heating state in the whole operation process, and a heat source is required to be kept for the temperature of the regenerator.
Disclosure of Invention
The invention aims to overcome the defects of the technology, and provides a through-row type replacement method for the checker bricks of the 7.63m coke oven, which is matched with improvement of a furnace wall repair mode after heat preservation perfection and recovery of a furnace wall, so that the replacement of the checker bricks of the full furnace of the 7.63m coke oven is successfully completed.
In order to achieve the purpose, the invention provides a through-row type replacement method for the checker bricks of the 7.63m coke oven regenerator, which comprises the following steps:
A) The method comprises the steps of adjusting a heating system of a regenerator needing to be changed with checker bricks in advance, and ensuring that the regenerator has sufficient heat source to maintain temperature in the checker brick changing process;
B) Dismantling the old checker bricks;
C) And (5) reloading the new checker bricks.
Preferably, in the step A), the heating system adjustment comprises setting a number N regenerator with a checker brick to be replaced, corresponding to the N carbonization chamber stewing furnace, and adjusting the stop heating time of the N-1 carbonization chamber stewing furnace, the N carbonization chamber stewing furnace and the N+1 carbonization chamber stewing furnace to 60%, 75% and 60% of coking time, wherein the carbonization chamber is a heat source in normal production by taking reverse heat transfer of the carbonization chamber as a heat source, coke in the carbonization chamber can also be a heat source when the carbonization chamber stops heating, the time of starting semicoke shrinkage of all coal materials in the carbonization chamber is about 60% of coking time through system analysis, and the stop heating time of the three carbonization chamber stewing furnaces is respectively adjusted to 60%, 75% and 60% of coking time through calculation of heat dissipation in three days, so that a sufficient heat source in the combustion chamber and the heat storage chamber in the operation process is ensured.
Preferably, in the step A), the heating system adjustment comprises setting the number of the regenerator needing to be changed with the checker bricks as N regenerator, heating the N-1 regenerator, the N regenerator and the N+1 regenerator before stopping heating, closing a gas adjusting cock and an air door when the air flow is risen, maintaining 2-3 exchange times, increasing the temperature of the regenerator in advance, and expanding the width of a temperature drop curve of the temperature in the regenerator.
Preferably, in the step A), the heating system adjustment comprises setting the number of the regenerator needing to be changed with the checker bricks as N regenerator, closing all the air doors of the N-1 regenerator and the N+1 regenerator in the operation process, slightly opening the waste gas shutter by 1/3, realizing waste gas circulation, ensuring heat transfer, realizing controllable temperature maintenance, transferring heat to the N regenerator and controlling temperature drop.
Preferably, in the step B), the method includes the following steps:
B1 Iron plates are covered on the exchange shutter to prevent broken bricks from blocking the exchange equipment to influence the exchange;
B2 Removing a coke dripping plate on the coke oven machine and the coke side operation platform, wherein the height of a removed sealing wall is as consistent as possible with that of the to-be-removed checker bricks so as to reduce the invasion influence on the cold air of the rest checker bricks, and manufacturing a baffle plate, and sealing and blocking the cold air from entering a regenerator chamber in a construction gap;
B3 The special tool comprises hooks, a flat shovel and a chute, wherein the chute is a U-shaped chute which is made of a 3mm thick steel plate and is sealed on three sides, the chute is arranged on the top of the next layer of checker bricks of the checker bricks to be removed to prevent sundries from falling onto the next layer of checker bricks, the removed checker bricks are moved out along the chute through the hooks, the chute is gradually pushed inwards along with the removal of the upper layer of checker bricks, if the burnt checker bricks are used for poking and breaking the checker bricks along the chute to remove the checker bricks in the process of removing the checker bricks, the removal sequence of the checker bricks is' from top to bottom, and when the checker bricks are removed, the partition walls inside the checker bricks are supported to prevent the inner checker bricks from collapsing;
b4 Covering the top of the part from which the checker bricks are taken out by using a heat-insulating plate to prevent sundries from falling to the next layer of checker bricks, gradually pushing the heat-insulating plate along with the taking out of the upper layer of checker bricks, wherein the heat-insulating plate adopts a combination of a galvanized plate with delta=1 mm, a ceramic fiber blanket with delta=50 mm and an iron plate with delta=3 mm, and when the heat-insulating plate is installed, the galvanized plate surface is placed at the lower part and contacts with the checker bricks;
b5 After all the partition lattice bricks are extracted, the bottom is paved with a heat-insulating plate, and simultaneously, the corresponding two sides and the top wall are paved with ceramic fiber blankets which are used as heat insulation measures of an operation area and heat insulation measures of a furnace wall.
Preferably, in the step C), the method includes the following steps:
C1 Before installing the new checker bricks, checking the appearance size of the new checker bricks, determining the quality of the changed checker bricks, and sorting the material and brick number of the checked brick;
c2 Each grid brick is installed from bottom to top, and partition walls are built after the single grid is installed;
C3 After the check is installed, the construction of the coke oven regenerator sealing wall is resumed, the coke oven regenerator sealing wall is constructed according to the original design requirement, and the wall surface is coated with heat preservation materials after the coke oven regenerator sealing wall is constructed, thus completing the online replacement of the coke oven regenerator check bricks.
Compared with the prior art, the invention has the advantages that the checker bricks are integrally replaced, hidden danger of the checker bricks of the regenerator can be thoroughly eliminated, the temperature of the brick walls of the regenerator is kept during replacement, and the replacement of the checker bricks of the regenerator of the 7.63m coke oven is successfully completed by matching with improvement of a furnace wall repairing mode after perfect heat preservation and recovery of the furnace wall.
Drawings
FIG. 1 is a state diagram of a corresponding regenerator in accordance with the present invention.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
A7.63 m coke oven regenerator checker brick row-through type replacement method comprises the following steps:
A) The method comprises the steps of adjusting a heating system of a regenerator needing to be changed with checker bricks in advance, and ensuring that the regenerator has sufficient heat source to maintain temperature in the checker brick changing process;
B) Dismantling the old checker bricks;
C) And (5) reloading the new checker bricks.
In the step A), the heating system adjustment comprises setting the number of the regenerative chamber needing to be replaced with the checker brick as shown in the figure 1 as N regenerative chamber, corresponding to N carbonization chamber stewing, and adjusting the heating stopping time of the N-1 carbonization chamber stewing, the N carbonization chamber stewing and the N+1 carbonization chamber stewing to 60%, 75% and 60% of coking time.
Or in the step A), the heating system adjustment comprises the steps of setting the number of the regenerators needing to replace the checker bricks as shown in the figure 1 as N regenerators, heating the N-1 regenerators, the N regenerators and the N+1 regenerators before stopping heating, closing a gas adjusting cock and an air door when the air flow is risen, and keeping the exchange time for 2-3.
In other embodiments, the heating system adjustment in the step A) can also comprise setting the number of the regenerators needing to be replaced with checker bricks as N regenerators as shown in FIG. 1, closing all the air doors of the N-1 regenerators and the N+1 regenerators during operation, and slightly opening the exhaust shutter by 1/3.
In addition, in the present embodiment, step B) includes the steps of:
B1 Iron plates are covered on the exchange shutter to prevent broken bricks from blocking the exchange equipment to influence the exchange;
B2 Removing a coke dripping plate on the coke oven machine and the coke side operation platform, wherein the height of a removed sealing wall is as consistent as possible with that of the to-be-removed checker bricks so as to reduce the invasion influence on the cold air of the rest checker bricks, and manufacturing a baffle plate, and sealing and blocking the cold air from entering a regenerator chamber in a construction gap;
B3 The special tool comprises hooks, a flat shovel and a chute, wherein the chute is a U-shaped chute which is made of a 3mm thick steel plate and is sealed on three sides, the chute is arranged on the top of the next layer of checker bricks of the checker bricks to be removed to prevent sundries from falling onto the next layer of checker bricks, the removed checker bricks are moved out along the chute through the hooks, the chute is gradually pushed inwards along with the removal of the upper layer of checker bricks, if the burnt checker bricks are used for poking and breaking the checker bricks along the chute to remove the checker bricks in the process of removing the checker bricks, the removal sequence of the checker bricks is' from top to bottom, and when the checker bricks are removed, the partition walls inside the checker bricks are supported to prevent the inner checker bricks from collapsing;
b4 Covering the top of the part from which the checker bricks are taken out by using a heat-insulating plate to prevent sundries from falling to the next layer of checker bricks, gradually pushing the heat-insulating plate along with the taking out of the upper layer of checker bricks, wherein the heat-insulating plate adopts a combination of a galvanized plate with delta=1 mm, a ceramic fiber blanket with delta=50 mm and an iron plate with delta=3 mm, and when the heat-insulating plate is installed, the galvanized plate surface is placed at the lower part and contacts with the checker bricks;
b5 After all the partition lattice bricks are extracted, the bottom is paved with a heat-insulating plate, and simultaneously, the corresponding two sides and the top wall are paved with ceramic fiber blankets which are used as heat insulation measures of an operation area and heat insulation measures of a furnace wall.
In this embodiment, step C) includes the following steps:
C1 Before installing the new checker bricks, checking the appearance size of the new checker bricks, determining the quality of the changed checker bricks, and sorting the material and brick number of the checked brick;
c2 Each grid brick is installed from bottom to top, and partition walls are built after the single grid is installed;
C3 After the check is installed, the construction of the coke oven regenerator sealing wall is resumed, the coke oven regenerator sealing wall is constructed according to the original design requirement, and the wall surface is coated with heat preservation materials after the coke oven regenerator sealing wall is constructed, thus completing the online replacement of the coke oven regenerator check bricks.
Claims (3)
1. A through-row type replacement method for checker bricks of a 7.63m coke oven regenerator is characterized by comprising the following steps:
A) The method comprises the steps of setting a number N regenerator with a serial number of the regenerator with the checker brick to be replaced, corresponding to an N carbonization chamber stewing furnace, adjusting the stop heating time of the N-1 carbonization chamber stewing furnace, the N carbonization chamber stewing furnace and the N+1 carbonization chamber stewing furnace to 60%, 75% and 60% of coking time, heating the N-1 regenerator, the N regenerator and the N+1 regenerator before stopping heating, closing a gas adjusting cock and an air door when ascending air flow, keeping 2-3 exchange times, and fully closing the N-1 regenerator and the air door of the N+1 regenerator in the operation process, and slightly opening a waste gas shutter by 1/3;
B) Dismantling the old checker bricks;
C) And (5) reloading the new checker bricks.
2. The method for replacing checker bricks of a 7.63m coke oven regenerator according to claim 1, wherein said step B) comprises the steps of:
B1 Iron plates are covered on the exchange shutter to prevent broken bricks from blocking the exchange equipment to influence the exchange;
B2 Removing a coke dripping plate on the coke oven machine and the coke side operation platform, wherein the height of a removed sealing wall is as consistent as possible with that of the to-be-removed checker bricks so as to reduce the invasion influence on the cold air of the rest checker bricks, and manufacturing a baffle plate, and sealing and blocking the cold air from entering a regenerator chamber in a construction gap;
B3 The special tool comprises hooks, a flat shovel and a chute, wherein the chute is a U-shaped chute which is made of a 3mm thick steel plate and is sealed on three sides, the chute is arranged on the top of the next layer of checker bricks of the checker bricks to be removed to prevent sundries from falling onto the next layer of checker bricks, the removed checker bricks are moved out along the chute through the hooks, the chute is gradually pushed inwards along with the removal of the upper layer of checker bricks, if the burnt checker bricks are used for poking and breaking the checker bricks along the chute to remove the checker bricks in the process of removing the checker bricks, the removal sequence of the checker bricks is' from top to bottom, and when the checker bricks are removed, the partition walls inside the checker bricks are supported to prevent the inner checker bricks from collapsing;
b4 Covering the top of the part from which the checker bricks are taken out by using a heat-insulating plate to prevent sundries from falling to the next layer of checker bricks, gradually pushing the heat-insulating plate along with the taking out of the upper layer of checker bricks, wherein the heat-insulating plate adopts a combination of a galvanized plate with delta=1 mm, a ceramic fiber blanket with delta=50 mm and an iron plate with delta=3 mm, and when the heat-insulating plate is installed, the galvanized plate surface is placed at the lower part and contacts with the checker bricks;
b5 After all the partition lattice bricks are extracted, the bottom is paved with a heat-insulating plate, and simultaneously, the corresponding two sides and the top wall are paved with ceramic fiber blankets which are used as heat insulation measures of an operation area and heat insulation measures of a furnace wall.
3. The method for replacing checker bricks of a 7.63m coke oven regenerator according to claim 1, wherein said step C) comprises the steps of:
C1 Before installing the new checker bricks, checking the appearance size of the new checker bricks, determining the quality of the changed checker bricks, and sorting the material and brick number of the checked brick;
c2 Each grid brick is installed from bottom to top, and partition walls are built after the single grid is installed;
C3 After the check is installed, the construction of the coke oven regenerator sealing wall is resumed, the coke oven regenerator sealing wall is constructed according to the original design requirement, and the wall surface is coated with heat preservation materials after the coke oven regenerator sealing wall is constructed, thus completing the online replacement of the coke oven regenerator check bricks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211694257.2A CN115806830B (en) | 2022-12-28 | 2022-12-28 | Method for replacing checker bricks of regenerative chamber of 7.63m coke oven in row mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211694257.2A CN115806830B (en) | 2022-12-28 | 2022-12-28 | Method for replacing checker bricks of regenerative chamber of 7.63m coke oven in row mode |
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| CN115806830A CN115806830A (en) | 2023-03-17 |
| CN115806830B true CN115806830B (en) | 2025-11-21 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106032469A (en) * | 2015-03-11 | 2016-10-19 | 五冶集团上海有限公司 | Coke oven regenerative chamber checker brick on-line replacing method |
| CN114790395A (en) * | 2021-01-26 | 2022-07-26 | 山西太钢不锈钢股份有限公司 | Heat preservation process for thermal state overhaul of coke oven regenerator |
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2022
- 2022-12-28 CN CN202211694257.2A patent/CN115806830B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106032469A (en) * | 2015-03-11 | 2016-10-19 | 五冶集团上海有限公司 | Coke oven regenerative chamber checker brick on-line replacing method |
| CN114790395A (en) * | 2021-01-26 | 2022-07-26 | 山西太钢不锈钢股份有限公司 | Heat preservation process for thermal state overhaul of coke oven regenerator |
Non-Patent Citations (2)
| Title |
|---|
| 杨帆等.武钢7.63m焦炉蓄热室格子砖变形熔损原因探讨.钢铁.2016,第51卷(第06期),第94-99页. * |
| 武钢7.63m焦炉蓄热室格子砖变形熔损原因探讨;杨帆等;钢铁;20160615;第51卷(第06期);第94-99页 * |
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